Email field is made not mandatory in user creation and editing.

Change-Id: I92a3b5539a20d855ae725a2993bf77eace3c0e28
Fixes: bug #1185195
Add Image Source Field to choose Location or File

Change-Id: I79546c5c2d10b7d6cefdca084f4f7a13ce2939d5
Fixes: bug #1185671
calling nova extensions api to enable certain nova features

Fixes: bug #1202310

Change-Id: I47365b0a89ab572f25cb71bfe17cae547261df9d
Merge "calling nova extensions api to enable certain nova features"
Merge "Email field is made not mandatory in user creation and editing."
Merge "Add Image Source Field to choose Location or File"